Finding the Fourth Proportional to 3,930.60, 5,924.18 and 3,389.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,930.60 : 5,924.18 = 3,389.32 : x
2. Step 2: Convert to fraction form
   3,930.60/5,924.18 = 3,389.32/x
3. Step 3: Cross multiply
   3,930.60x = 5,924.18 × 3,389.32
4. Step 4: Simplify right side
   3,930.60x = 20,078,941.76
5. Step 5: Solve for x
   x = 20,078,941.76/3,930.60
6. Step 6: Final answer
   x = 5,108.37